![]() Before Webb, the now-retired Spitzer telescope observed this supernova in infrared throughout its entire lifespan, yielding key data about how its emissions evolved over time. The high resolution of these images is also noteworthy. In other words, our viewing angle makes it appear that there is more material in these two crescents than there actually may be. ![]() Their brightness may be an indication of limb brightening, an optical phenomenon that results from viewing the expanding material in three dimensions. These crescents are thought to be a part of the outer layers of gas shot out from the supernova explosion. ![]() While these structures have been observed to varying degrees by NASA’s Hubble and Spitzer Space Telescopes and Chandra X-ray Observatory, the unparalleled sensitivity and spatial resolution of Webb revealed a new feature in this supernova remnant – small crescent-like structures. These are the locations of supernova shocks hitting more exterior material. Now spots are found even exterior to the ring, with diffuse emission surrounding it. The equatorial ring, formed from material ejected tens of thousands of years before the supernova explosion, contains bright hot spots, which appeared as the supernova’s shock wave hit the ring. The dust is so dense that even near-infrared light that Webb detects can’t penetrate it, shaping the dark “hole” in the keyhole.Ī bright, equatorial ring surrounds the inner keyhole, forming a band around the waist that connects two faint arms of hourglass-shaped outer rings. This center is packed with clumpy gas and dust ejected by the supernova explosion. This image reveals a central structure like a keyhole. Download the full resolution image from the Space Telescope Science Institute.
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